One of the remaining components on my DSO board are the DC/DC-Converters. I have a few of them, and I have to do the layout carefully to avoid noise.
In some datasheets layout examples are available similar to this picture: http://www.mikrocontroller.net/attachment/44284/Bild_1.png I think I can make the copper areas with PCB polygons. But the pads of the components will not touch the copper polygons by default. I wonder if I should connect the pads to polygons by traces, or if I should reduce the clearance of the pads for full contact. The later may make hand soldering difficult. I think this type of layout would be easier if we would have "negative traces" so that we could draw one large copper rectangle and cut it in pieces by negative traces. Just found a nice paper of DC/DC-Converter layout principles, if someone is interested: http://www.edn.com/contents/images/6347258.pdf _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user